/* ************************************************************************

   qooxdoo - the new era of web development

   http://qooxdoo.org

   Copyright:
     2004-2007 1&1 Internet AG, Germany, http://www.1and1.org

   License:
     LGPL: http://www.gnu.org/licenses/lgpl.html
     EPL: http://www.eclipse.org/org/documents/epl-v10.php
     See the LICENSE file in the project's top-level directory for details.

   Authors:
     * Sebastian Werner (wpbasti)
     * Andreas Ecker (ecker)
     * Carsten Lergenmueller (carstenl)

************************************************************************ */

/* ************************************************************************

#module(dev)

************************************************************************ */

/**
 * Retrieve information about global namespace pollution
 */
qx.OO.defineClass("qx.dev.Pollution");

qx.Class.names =
{
  "window" : window,
  "document" : document,
  "body" : document.body
}

qx.Class.ignore =
{
  "window" :
  [
    // qooxdoo
    "qx",

    // Java
    "java",
    "sun",
    "Packages",

    // Firefox
    "__firebug__",
    "Components",
    "controllers",
    "sessionStorage",
    "globalStorage",

    // Firefox extension: Firebug
    "console",

    // IE
    "event",
    "offscreenBuffering",
    "clipboardData",
    "clientInformation",
    "Option",
    "Image",
    "external",
    "screenTop",
    "screenLeft",

    // Standard
    "length",
    "window",
    "document",
    "location",
    "navigator",
    "netscape",
    "parent",
    "frames",
    "top",
    "scrollbars",
    "name",
    "scrollX",
    "scrollY",
    "self",
    "screen",
    "history",
    "content",
    "menubar",
    "toolbar",
    "locationbar",
    "personalbar",
    "statusbar",
    "directories",
    "closed",
    "crypto",
    "pkcs11",
    "opener",
    "status",
    "defaultStatus",
    "innerWidth",
    "innerHeight",
    "outerWidth",
    "outerHeight",
    "screenX",
    "screenY",
    "pageXOffset",
    "pageYOffset",
    "scrollMaxX",
    "scrollMaxY",
    "fullScreen",
    "frameElement",
    "XMLHttpRequest"
  ],

  "document" :
  [
    "domConfig",
    "location",
    "compatMode",
    "implementation",
    "defaultView",
    "title",
    "body",
    "styleSheets",
    "documentElement",
    "nodeName",
    "nodeType",
    "firstChild",
    "lastChild",
    "doctype",
    "images",
    "applets",
    "links",
    "forms",
    "anchors",
    "cookie",
    "embeds",
    "plugins",
    "designMode",
    "childNodes"
  ],

  "body" :
  [
    "textContent",
    "innerHTML",
    "outerHTML",
    "innerText",
    "outerText",
    "scopeName",
    "parentElement",
    "tagName",
    "filters",
    "contentEditable",
    "document",
    "currentStyle",
    "isMultiLine",
    "clientHeight",
    "clientWidth",

    "lastChild",
    "firstChild",
    "offsetTop",
    "offsetLeft",
    "offsetWidth",
    "offsetHeight",
    "tabIndex",
    "className",
    "attributes",
    "previousSibling",
    "nextSibling",
    "ownerDocument",
    "localName",
    "childNodes",
    "parentNode",
    "nodeType",
    "nodeName",
    "style",

    "scrollTop",
    "scrollLeft",
    "scrollWidth",
    "scrollHeight"
  ]
}

qx.Class.consoleInfo = function(object)
{
  var msg = qx.dev.Pollution.getTextList(object);

  if (msg) {
    alert("Global namespace is polluted by the following unknown objects:\n\n" + msg);
  } else {
    alert("Global namespace is not polluted by any unknown objects.");
  }
}

qx.Class.extract = function(object)
{
  var ext = [];
  var ign = qx.dev.Pollution.ignore[object];
  var clientInfos = qx.core.Client.getInstance();

  //IE offers a window[index] access to the frames of a window, i. e.
  //for three frame, the window object will have attributes "0", "1" and "2"
  if (clientInfos.isMshtml() && (object == "window")){
    ign = ign.slice();
    for (var frameIndex = 0; frameIndex < window.length; frameIndex++){
      ign.push("" + frameIndex);
    }
  }

  var obj = qx.dev.Pollution.names[object];

  for (var key in obj)
  {
    try
    {
      //MS IE 7 crashes when doing typeof(window.external), catch here
      if ( clientInfos.isMshtml() && (clientInfos.getMajor() >= 7)
           && (object == "window") && (key == "external") ) {
        continue;
      }

      // Ignore null or undefined values
      if (typeof obj[key] == "undefined" || obj[key] === null) {
        continue;
      }

      // Ignore native code
      if (typeof obj[key] == "function" && obj[key].toString().indexOf("[native code]") != -1) {
        continue;
      }

      // Ignore if configured
      if (qx.lang.Array.contains(ign, key)) {
        continue;
      }

    }
    catch(ex)
    {
      continue;
    }

    ext.push({ "key" : key, "value" : obj[key] });
  }

  return ext;
}

qx.Class.getHtmlTable = function(object)
{
  var all = [];

  var rowStart = "<tr style='vertical-align:top'><td>";
  var cellSplit = "</td><td>";
  var rowEnd = "</td></tr>";

  all.push("<table>");

  var ext = this.extract(object);

  for (var i=0; i<ext.length; i++) {
    all.push(rowStart + ext[i].key + cellSplit + ext[i].value + rowEnd);
  }

  all.push("</table>");

  return all.join("");
}

qx.Class.getTextList = function(object)
{
  var all = [];

  var cellSplit = ": ";
  var rowEnd = "\n";

  var ext = this.extract(object);

  for (var i=0; i<ext.length; i++) {
    all.push(ext[i].key + cellSplit + ext[i].value + rowEnd);
  }

  return all.join("");
}